Roller



Patented Apr. 28, 1931 ITED STATES PATENT OFF/ICE AUGUSTO DINA, F JERSEY CITY, NEW JERSEY, ASSIGNOR TO INTERNATIONAL PRO- JECTOR CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE ROLLER Application filed September 12, 1928. Serial No. 305,385.

This invention relates to an improved construction of roller which may be employed in various types of machines. In particular, the invention has to do with a novel type of roller which may be quickly and readily produced at minimum cost and which may be composed, in part, of standard constructional elements. The novel roller may be employed as an idler roller or as a driven or drive roller.

Such an improved roller is adaptable for uses in motion projection machines and it will be herein defined and explained as being adaptable for use in such a machine. One instance of its use in the picture projection machines is to have two of them form the fire trap at the film exit at the upper film magazine, and to have another set form the fire trap at the film entrance to the lower magazine. Another instance of its use in such machines is as an idler roller, sometimes called a pad roller, for frictionally engaging the film and holding it against one of the sprockets which assists in driving the film through the apparatus. 7

The object of the invention is to simplify the construction of rollers in such manner that they can be more economically produced by making the machining of the roller surfaces more simple than has hitherto been the case and yet to produce a roller which is at least as accurately designed as before.

Hitherto pad and similar rollers have been made in one piece and, because of their relatively long length, the process of sufficiently accurately machining them so that their filmengaging surfaces would be parallel with their axes has been rather difficult and cer tainly expensive. eliminates these difficulties by splitting up the roller construction into several parts, each of which may be machined separately and more easily and then readily assembled into a compact, rigid, structurefunctioning the same as the prior rollers.

Further and more specific objects, features, and advantages will more clearly appear from the detailed description given below taken in connection with the accompanying drawings which form part of the specification, which This invention, however,

illustrate one embodiment of the invention, and in which, g

Fig. 1 is a longitudinal section taken through one form of the invention,

Fig. 2 is a longitudinal section through the same form of the invention supplied with stub shafts by means of which it can be journalled in suitable bearings, and,

Fig. '3 is a similar section through another form of the invention adapted for use in connection with a film-carryingsprocket and to besupported from an arm from the motion picture or other apparatus.

The form of the invention shown in the drawings, which is but one of the forms it may assume, comprises a tube 10, the inner and outer surfaces of which can readily be machined to make them parallel with theaxis of the tube 10. This tube is supported on heads 11 and 12, having shoulders 13 and 14 againstwhich the ends of tube 10 bear and also provided with sleeves 15 and 16 which can be separately machined to fit tightly within the ends of tube 10. The heads 11 and 12 have bores Hand 18 in which stub shafts 19 and 20 arejournalled for rotation therein. These stub shafts 19 and 20 have enlarged inner ends 21 and 22 to prevent their movement out of the bores 17 and 18; A spring 23 is disposed within the tube 10 and extends between the-enlarged ends 21 and 22v to hold the stub shafts in the position shown in'Fig. 2. Thus this form of the invention comprises several parts which can each separately be properly machined lwith ease and economy and then assembled to form the unit shown.

The form of the invention shown in Fig. 3 which is adapted for use with a sprocket wheel for moving a film comprises the tube 24, machined as above described, against the ends of which bear the shoulders 25 and 26 v on heads 27 and 28 provided with sleeves 29 and 30, machined, and extending into the ends of the tube 24. The heads 27 and 28 are provided with bores 31 and 32 through which passes a shaft 33 to one end of which a handle 34 is fastened and to the other end of which an arm 35 is threadably connected. The shaft 33 is machined to rotatably fit into the bores 31 and 32-. In this form of the invention the heads 27 and 28 are provided with circumferential grooves 36 and 37 to receive the teeth on the sprocket wheel with which the roller is adapted to engage. The edges of the film moved by the sprocket wheel are disposed between the end flanges 38 and 39 on the heads 27 and 28. It will be noted that in each of the figures there is an opening 34 for readily oiling the bearing parts.

By reason of the ease with which the several parts of the improved roller can be machined with accurate relation and parallel ism to the axis of the shafts on which the roller is mounted, and the reduction in the expense and time required for these operations compared to the previously required operations, the same or greater accuracy can be obtained with much less cost and expenditure of time.

WVhile this improvement has been described in detail and with respect to a preferred form thereof, I do not desire to be limited to such details or form since many changes and modifications may be made and the invention embodied in other forms without departing from the spirit and scope of the invention in its broader aspects. Hence I desire to cover all modifications and forms coming within the language or scope of any one or more of the appended claims.

What is claimed as new, is:

1. A roller construction comprising a tubular member, heads at the ends thereof, sleeves on said heads adapted to fit into the ends of the tubular member, said heads having bores therein, stub shafts in saidbores and extending therebeyond, and a spring within the tubular member and bearing against the inner end of the stub shafts to hold them apart.

2. A roller construction comprising a tubular member, heads at the ends thereof, sleeves on said heads adapted to fit into the ends of the tubular member, said heads having bores therein, stub shafts in said bores and extending therebeyond, said shafts having enlarged inner ends to prevent them from moving too far in one direction and a spring within the tubular member and disposed between the inner ends of the shafts to hold them apart.

AUGUSTO DINA. 

